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                        实体字符
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                            <b>1.7.</b>
                        
                        form表单
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                            <b>1.8.</b>
                        
                        拓展
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                        CSS
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                        元素选择器
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                        id和class选择器
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                        关系选择器
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                        伪类选择器
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                        属性选择器
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                            <b>2.6.</b>
                        
                        伪对象选择器
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                        字体
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                        元素颜色
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                        文本阴影
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                        文本的线
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                        <h1 id="&#x4F2A;&#x7C7B;&#x9009;&#x62E9;&#x5668;">&#x4F2A;&#x7C7B;&#x9009;&#x62E9;&#x5668;</h1>
<pre><code class="lang-html"><span class="hljs-tag">&lt;<span class="hljs-title">html</span>&gt;</span>
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                color: skyblue</span></span>;
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                color: pink</span></span>;
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            }
            .nav li:nth-of-type{

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<h3 id="&#x4F2A;&#x7C7B;&#x9009;&#x62E9;&#x5668;&#xFF08;&#xFF09;">&#x4F2A;&#x7C7B;&#x9009;&#x62E9;&#x5668;&#xFF08;&quot;:&quot;&#xFF09;</h3>
<p>&#x5728;&#x6307;&#x5B9A;&#x8303;&#x56F4;&#x5185;&#x7684;&#x5143;&#x7D20;&#xFF0C;&#x7CBE;&#x7EC6;&#x7684;&#x63A7;&#x5236;&#x5176;&#x4E2D;&#x4E00;&#x4E2A;&#x5143;&#x7D20;</p>
<p><em>&#x6CE8;&#x610F;&#xFF1A;&#x5BF9;&#x73B0;&#x6709;&#x7684;&#x76EE;&#x6807;&#x5143;&#x7D20;&#xFF0C;&#x8FDB;&#x884C;&#x66F4;&#x52A0;&#x8BE6;&#x7EC6;&#x7684;&#x72B6;&#x6001;&#x63A7;&#x5236;</em></p>
<pre><code class="lang-css"><span class="hljs-rule"><span class="hljs-attribute">ul </span>:<span class="hljs-value">first-child{
    <span class="hljs-comment">/*ul&#x4EE5;&#x4E0B;&#x7B2C;&#x4E00;&#x4E2A;&#x5B50;&#x5143;&#x7D20;&#xFF0C;&#x4E0D;&#x7BA1;&#x7C7B;&#x578B;&#x662F;&#x4EC0;&#x4E48;&#xFF0C;&#x53EA;&#x8981;&#x662F;&#x7B2C;&#x4E00;&#x4E2A;&#x5C31;&#x9009;&#x62E9;*/</span>
}

ul li:first-child{
    <span class="hljs-comment">/*ul&#x4EE5;&#x4E0B;&#x7B2C;&#x4E00;&#x4E2A;&#x5B50;&#x5143;&#x7D20;&#xFF0C;&#x5E76;&#x4E14;&#x662F;li&#x7C7B;&#x578B;&#x7684;&#xFF0C;&#x5C31;&#x9009;&#x62E9;*/</span>
}

&#x6839;&#x636E;&#x6307;&#x5B9A;&#x5143;&#x7D20;&#x7684;&#x7C7B;&#x578B;&#xFF0C;&#x6765;&#x505A;&#x7CBE;&#x51C6;&#x63A7;&#x5236;

<span class="hljs-number">1</span>.&#x5982;&#x679C;&#x5B50;&#x5143;&#x7D20;&#x7684;&#x7C7B;&#x578B;&#x4E0D;&#x5B9A;&#xFF0C;&#x4F46;&#x4F4D;&#x7F6E;&#x76F8;&#x5BF9;&#x56FA;&#x5B9A;&#xFF0C;&#x5E94;&#x8BE5;&#x9009;&#x62E9;nth-child&#x7CFB;&#x5217;&#xFF0C;&#x7C97;&#x66B4;&#x76F4;&#x63A5;&#xFF0C;&#x6839;&#x636E;&#x4F4D;&#x7F6E;&#x51B3;&#x5B9A;

<span class="hljs-number">2</span>.&#x5982;&#x679C;&#x5B50;&#x5143;&#x7D20;&#x7684;&#x4F4D;&#x7F6E;&#x4E0D;&#x5B9A;&#xFF0C;&#x4F46;&#x7C7B;&#x578B;&#x76F8;&#x5BF9;&#x56FA;&#x5B9A;&#x4E14;&#x7EDF;&#x4E00;&#xFF0C;&#x5E94;&#x8BE5;&#x9009;&#x62E9;nth-of-type&#x7CFB;&#x5217;&#xFF0C;&#x6548;&#x7387;&#x66F4;&#x9AD8;


###&#x5982;&#x679C;&#x6CA1;&#x6709;&#x6307;&#x660E;&#x7236;&#x5143;&#x7D20;&#xFF0C;&#x5219;&#x4F1A;&#x5168;&#x9875;&#x9762;&#x641C;&#x7D22;&#x5B50;&#x5143;&#x7D20;

**nth-child&#x7CFB;&#x5217;&#xFF0C;&#x9996;&#x8981;&#x6EE1;&#x8DB3;&#x6761;&#x4EF6;&#x662F;&#x4F4D;&#x7F6E;&#xFF0C;&#x7136;&#x540E;&#x624D;&#x8003;&#x8651;&#x6307;&#x5B9A;&#x7684;&#x5143;&#x7D20;&#x7C7B;&#x578B;** 

**nth-of-type&#x7CFB;&#x5217;&#xFF0C;&#x9996;&#x8981;&#x6EE1;&#x8DB3;&#x7684;&#x662F;&#x5143;&#x7D20;&#x7C7B;&#x578B;&#xFF0C;&#x7136;&#x540E;&#x624D;&#x8003;&#x8651;&#x4F4D;&#x7F6E;**

*&#x5E94;&#x8BE5;&#x5C3D;&#x53EF;&#x80FD;&#x52A0;&#x4E0A;&#x4E00;&#x4E2A;&#x7236;&#x5143;&#x7D20;&#xFF0C;&#x7F29;&#x5C0F;&#x641C;&#x7D22;&#x8303;&#x56F4;*

```css
            .nav li:first-child{
                color: skyblue</span></span>;
            }
            <span class="hljs-class">.nav</span> <span class="hljs-rule"><span class="hljs-attribute">li</span>:<span class="hljs-value"><span class="hljs-function">nth-child</span>(<span class="hljs-number">2</span>){
                color: pink</span></span>;
            }
            <span class="hljs-class">.nav</span> <span class="hljs-rule"><span class="hljs-attribute">li</span>:<span class="hljs-value">last-child{
                color: darkblue</span></span>;
            }
            <span class="hljs-class">.nav</span> <span class="hljs-rule"><span class="hljs-attribute">li</span>:<span class="hljs-value">last-of-type{
                color: pink</span></span>;
            }
            <span class="hljs-class">.nav</span> <span class="hljs-rule"><span class="hljs-attribute">li</span>:<span class="hljs-value">first-of-type{

            }
            .nav li:nth-of-type{

            }
</span></span></code></pre>
<p><strong>&#x6CE8;&#x610F;&#xFF0C;a:hover &#x5FC5;&#x987B;&#x4F4D;&#x4E8E; a:link &#x548C; a:visited &#x4E4B;&#x540E;&#xFF0C;a:active &#x5FC5;&#x987B;&#x4F4D;&#x4E8E; a:hover &#x4E4B;&#x540E;</strong></p>
<p><strong>&#x53EF;&#x9760;&#x7684;&#x987A;&#x5E8F;&#x662F;&#xFF1A;l(link)ov(visited)e h(hover)a(active)te, &#x5373;&#x7528;&#x559C;&#x6B22;(love)&#x548C;&#x8BA8;&#x538C;(hate)&#x4E24;&#x4E2A;&#x8BCD;&#x6765;&#x6982;&#x62EC;</strong></p>
<p>&#x901A;&#x5E38;&#x5236;&#x4F5C;&#x4E2D;&#xFF0C;&#x6211;&#x4EEC;&#x7528;&#x5F97;&#x66F4;&#x591A;&#x7684;&#x662F;hover</p>
<p> &#x6CA1;hover&#x7684;&#x65F6;&#x5019;&#xFF0C;&#x8868;&#x793A;&#x6B63;&#x5E38;&#x72B6;&#x6001;</p>
<p>&#x6709;hover&#x7684;&#x65F6;&#x5019;&#xFF0C;&#x8868;&#x793A;&#x6FC0;&#x6D3B;&#x72B6;&#x6001;&#xFF08;&#x4E92;&#x52A8;&#x72B6;&#x6001;&#xFF09;</p>
<pre><code class="lang-css">            <span class="hljs-class">.nav</span> <span class="hljs-rule"><span class="hljs-attribute">a</span>:<span class="hljs-value">link{
                background: gray</span></span>;
            }
            <span class="hljs-class">.nav</span> <span class="hljs-rule"><span class="hljs-attribute">a</span>:<span class="hljs-value">visited{
                background: green</span></span>;
            }
            <span class="hljs-class">.nav</span> <span class="hljs-rule"><span class="hljs-attribute">a</span>:<span class="hljs-value">hover{
                background: yellow</span></span>;
            }
            <span class="hljs-class">.nav</span> <span class="hljs-rule"><span class="hljs-attribute">a</span>:<span class="hljs-value">active{
                background: red</span></span>;
            }
</code></pre>
<p><a href="http://www.css88.com/book/css/selectors/pseudo-classes/index.htm" target="_blank">&#x66F4;&#x591A;&#x8BF7;&#x70B9;&#x51FB;&#x6211;</a></p>
<p><strong>&#xFF1A;&#x5728;&#x5143;&#x7D20;&#x6EE1;&#x8DB3;&#x6709;&#x7279;&#x6709;&#x7684;&#x6807;&#x7B7E;&#x7684;&#x65F6;&#x5019;&#xFF0C;&#x53EF;&#x4EE5;&#x66F4;&#x597D;&#x7684;&#x5728;&#x540C;&#x4E00;&#x7C7B;&#x7684;&#x5143;&#x7D20;&#x91CC;&#x9009;&#x62E9;&#x5176;&#x4E2D;&#x4E00;&#x4E2A;&#x5143;&#x7D20;&#x6765;&#x63A7;&#x5236;&#xFF0C;&#x50CF;&#x5728;&#x4E00;&#x5806;&#x7EFF;&#x8C46;&#x91CC;&#x9762;&#x6311;&#x4E00;&#x9897;&#x5927;&#x4E00;&#x70B9;&#x7684;&#xFF0C;&#x90A3;&#x4E48;&#x5B83;&#x5C31;&#x6709;&#x4E86;&#x5927;&#x4E00;&#x70B9;&#x7684;&#x4E00;&#x4E2A;&#x6211;&#x4EEC;&#x7ED9;&#x5B83;&#x5B9A;&#x4E49;&#x7684;&#x5BF9;&#x8C61;&#x6807;&#x7B7E;&#xFF1B;&#x800C;&#x4E14;&#x8FD9;&#x4E2A;&#x6807;&#x7B7E;&#x8FD8;&#x53EF;&#x4EE5;&#x6539;&#x53D8;&#x5F53;&#x9F20;&#x6807;&#x5212;&#x8FC7;&#x5143;&#x7D20;&#x7684;&#x65F6;&#x5019;&#x7684;&#x4E00;&#x4E9B;&#x6548;&#x679C;&#xFF0C;&#x8BA9;&#x7528;&#x6237;&#x66F4;&#x597D;&#x4F53;&#x9A8C;</strong></p>

                    
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